Gwyneth Paltrow Wears Sheer Dress To Iron - Yahoo7

Gwyneth Paltrow was named the world's Most Beautiful Woman on Wednesday, and she was clearly feeling foxy when she turned up at the premiere for her new film, Iron Man 3, later that day.

The 40-year-old actress walked onto the red carpet in a jaw-dropper of a gown with sheer side panels that showed off her taut derriere. Paltrow, however, said she selected the Antonio Berardi dress because the top portion reminded her of a superhero -- not because she wanted to flaunt her figure.

“You have to ask my stylist,” she said. “I think because it’s sexy. You’ve got all the sheer bits but it’s sort of ‘superheroes’ on top.”

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And of course, it shows off the body part that Paltrow's personal trainer Tracy Anderson calls “my masterpiece" - her derriere.

On hand at the premiere to talk about how she whipped Paltrow into Iron Man 3 shape, Anderson had nothing but praise for her client & friend: "She's someone who inside is really more beautiful than she is outside, if you can believe it," said Anderson.

As for Paltrow's most beautiful physical traits, Anderson says “I’m the most proud of her butt, that’s for sure. Because that was a transformation. And today, we can all appreciate the results of all that hard work."